[Job-32363] Senior Frontend Developer (React), Brazil

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy. We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day. We’re looking for a Senior Frontend Developer to join a CI&T squad working on a financial services client. You’ll help move an established Java-based web application onto a modern React frontend: analysing legacy pages, turning them into a well-structured component library, and building fast, accessible user interfaces. You’ll work closely with backend developers, UX/UI designers, QA and the Product Owner. What you’ll do - Build and maintain responsive, accessible user interfaces with React and TypeScript - Analyse legacy server-rendered pages and break them down into reusable React components - Grow and maintain a shared component library based on shadcn/ui - Connect the frontend to backend REST APIs: handle loading, error and empty states consistently - Write unit and component tests with Vitest/Jest and React Testing Library - Join refinement sessions: break features into tasks, estimate them and point out UX or technical risks - Review p